Hacker exploiting lua HELP please!

Someone on my server has either exploited some lua code in my server or is using wiremod to play wierd sounds globally, we hear darkrp voices playing at different pitches emmiting from every player and im worried they might have root access to my server with an exploit, can someone please help me if they know anything i could try to find out whats happening? There is no lua scripts in serverside and it didnt stop when i cleaned up sound emmiters and E2

pmed you